Adding 10% of the mains tension for crosses?

tennytive

Professional
Watching some badminton racket stringing videos and kept hearing the idea that crosses should be strung adding 10% of the mains tension in order to bring the racket shape back to normal.
Has anyone thought to try this for a tennis racket? Mains at 60lbs would mean crosses at 66. Does that make any sense?
Badminton rackets use lower tensions so 2 lbs may not sound like a big deal, but I wonder if the proportions would mean the same pressure exerted on each frame.
I have a badminton racket to string and want to try this, but I would hesitate on a tennis racket.
What do you think?
 

esgee48

Legend
If this is your own frame, go right ahead with the experiment. If this is a clients' frame, you need their permission as to why you think they should listen to you. Higher cross tensions will generally lock the mains in place. I do not think the experiment is worthwhile unless that is your intent. Or you are installing a cross string that loses tension like crazy.
 

AndI

Rookie
It seems that the most common string pattern in badminton racquets is 22x22. Equal number of strings on mains and crosses. In tennis, we always have 2 to 3 strings more on the crosses than on the mains. I think this explains why they recommend 10% more on the crosses, but we do not do it in tennis.

Lets start with a tennis racquet and assume that the load on the frame is balanced for the 16 mains, 18 or 19 crosses, strung at an equal tension. Now, to get a configuration similar to that of a badmington racquet, lets imagine that we added two or three mains to this racquet. This would create an imaginary tennis racquet with equal number of main and cross strings. This would also create an unbalanced load, right? It was balanced before the imaginary experiment, but we added two or three tensioned mains each of which pulls at 50+ Lbs! With this change, the balance of load goes down the drain: mains would exert roughly 10-15% more force on the frame than crosses. To compensate this, we would have to increase the tension of the crosses by about the same 10-15%. Here we go, 10-15% higher tension on the crosses for equal number of main and cross strings and a balanced load on the frame. But we do not see equal number of mains and crosses in tennis, we always have more crosses, so whatever is good in badmington, does not apply in tennis. Makes sense?

In badminton it can be complex, too, because 22x22 is not the only string pattern, but as I said, seems to be the most common one. Yonex, which, e.g., recommends this 10% more on crosses, makes most of their racquets in 22x22.

On top of that, in tennis, spin is a big thing and we want the mains to be able to slide slightly. In badminton, I believe, control and the stiff string bed is the thing. But I am not an expert. I only played badminton on a "beach entertainment" level. Don't even know how to play it correctly.
 
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tennytive

Professional
Good answers. Yes, my badminton racket. I don't remember seeing people upping the cross tensions a few years ago when I last watched badminton stringers. Maybe a new development, along with stringing rackets as high as 38 lbs. now for one or two pros. I think I will go for 22 on mains and 24 on crosses and see how that compares to another racket I have. As far as tennis rackets, I don't see how it could help, especially as AndI said, different patterns and different techniques needed for each game. The only time I changed tensions for crosses was in hybrids that used poly for mains and syn gut for crosses. Appreciate the replies.
 

afeller

New User
I string 2/3 badminton rackets. For me is 0,6 kg more on crosses the standard, not 10 %. Sometimes (and especially for my own rackets) i use 0,8 kg (~2 lbs) more. And as @Andl said, it depends on the 22x22 string pattern. I've noticed, if i strung mains=crosses, that the racket gets rounder and rounder after playing a while. Not directly after stringing. Some rackets more than other.

And please string the badminton rackets bottom up!
 
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